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. 2024 Mar 1;15:1357411. doi: 10.3389/fphys.2024.1357411

FIGURE 3.

FIGURE 3

Histological cross sections of fourth instar larvae of An. stephensi at 24 h post treatment with plant essential oil showed significant damage to the larval gut tissues. (A) Control larvae (without essential oil treatment); (B) Larval tissues of essential oil-treated larvae are abnormal compared to the control group, exhibiting vacuolated gut epithelium (epi), muscles (mu), nucleus (nu), and fat body (fb). The gut lumen (lu) and adipose tissue (ad) show brown granules, indicating fragmentation or damage caused by the essential oil. The scale bar size is 300 µm.